.TopClass {
  border-bottom: 1px solid white;
  display: flex;
  align-items: center;
  width: 100%;
  height: 10vh;
  transition: background 0.3s;
}

.TopLogo {
  margin-left: 3rem;
  width: 20%;
}

.TopCenter {
  width: 60%;
  display: flex;
  justify-content: space-around;
  height: 100%;
}

.TopRight {
  width: 20%;
}

.meanClass {
  cursor: pointer;
  transition: color 0.3s;
}

.meanTextClass {
  height: 99%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.meanTextClass:hover {
  color: rgba(13, 158, 215);
}

.meanClass:hover .BorderLeft {
  height: 1%;
  animation: lineAppear 0.5s ease-in-out forwards;
}

.BorderLeft {
  width: 100%;
  height: 1%;
}

.BottonmClass {
  border-top: 1px solid #666666;
  height: 100%;
  width: 100%;
  padding: 0 10% 2% 10%;
  display: flex;
  justify-content: left;
  flex-wrap: wrap;
  position: relative;
  z-index: 10;
  transition: background 0.3s;
}

.BottonmClassCenter {
  width: 16%;
}

.BottonmClassCenterText {
  text-align: left;
  height: 100%;
  width: 100%;
  padding: 10% 10% 10% 0;
  display: flex;
  justify-content: space-between;
}

.BottonmClassCenter:hover .BorderLeft {
  height: 1%;
  animation: lineAppearBottom 0.5s ease-in-out forwards;
}

@keyframes lineAppearBottom {
  0% {
    height: 2px;
    width: 0;
    background-color: rgba(13, 158, 215);
    border-radius: 5px;
  }
  100% {
    height: 2px;
    width: 90%;
    background-color: rgba(13, 158, 215);
    border-radius: 5%;
  }
}

@keyframes lineAppear {
  0% {
    height: 2px;
    width: 0;
    background-color: rgba(13, 158, 215);
    border-radius: 5px;
  }
  100% {
    height: 2px;
    width: 100%;
    background-color: rgba(13, 158, 215);
    border-radius: 5%;
  }
}

/* 下拉菜单动画 */
.fadeDownEnter {
  animation: fadeDown 0.5s ease-out forwards;
  opacity: 1;
  transform: translateY(0);
}

.fadeDownLeave {
  animation: fadeUp 0.5s cubic-bezier(1, 0.5, 0.8, 1) forwards;
  opacity: 0;
  transform: translateY(-1rem);
}

@keyframes fadeDown {
  from {
    opacity: 0;
    transform: translateY(-1rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeUp {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-1rem);
  }
}